Finding the Fourth Proportional to 150,386, 207,532.72 and 89,959.20

Step by Step Solution

1. Step 1: Write the proportion equation
   150,386 : 207,532.72 = 89,959.20 : x
2. Step 2: Convert to fraction form
   150,386/207,532.72 = 89,959.20/x
3. Step 3: Cross multiply
   150,386x = 207,532.72 × 89,959.20
4. Step 4: Simplify right side
   150,386x = 18,669,477,465.02
5. Step 5: Solve for x
   x = 18,669,477,465.02/150,386
6. Step 6: Final answer
   x = 124,143.72